变截面悬链线箱型无铰拱桥爆破拆除稳定性分析

某桥为中承变截面的悬链线箱型薄壁无铰拱桥,属危桥,已出现严重破坏和变形.为保证控制爆破前的预处理过程中桥的整体稳定性,对欲破坏部分和处理强度进行了稳定性分析.实践证明,对大桥预处理分析有助于爆破实施,且最大限度地保证了施工安全.对整个大桥进行了多种模型和方案的比较分析,最后据此确定了合理的爆破方案和微差起爆顺序.

STABILITY ANALYSIS ON DEMOLITION OF A HINGELESS ARCH BRIDGE OF VARIABLE CROSS-SECTION, CATENARY-BOX TYPE

A hingeless arch bridge of variable cross|section,catenary|box type has presented serious damage and deformation process before the controlled blasting,stability analysis on the object part and processing strength is carried out.Practice shows that pretreatment analysis on the bridge is helpful to the implementation of blasting and can guarantee the safety of construction to the full extent.The paper carries out the comparative analysis on several models and plans and finalizes the rational blasting plan and short delay detonation sequence.;